OMRON ES1C-A40 — Spot Temperature Sensors
Omron ES1C-A40: infrared thermosensor, 0 to 400 °C, 4 to 20 mA DC output, 12 to 24 V DC, M18 stainless steel housing, IP67 equivalent.
Status: In production
Brand: Omron
Product: Infrared thermosensor, 0 to 400 °C, 4 to 20 mA output
Measuring range: 0 to 400 °C
Output: 4 to 20 mA DC, load 250 Ω max.
Power supply: 12 to 24 V DC
Response time: 100 ms (90%)
Degree of protection: Equivalent to IP67
Omron ES1C-A40 is an infrared thermosensor for non-contact temperature measurement from 0 to 400 °C. The thermopile receiving element detects radiation in the 8 to 14 µm band and the internal circuit converts it into a 4 to 20 mA DC current output corresponding to 0 to 400 °C, giving strong resistance to noise. Emissivity is fixed at 0.95. The measurement spot for 90% optical response is 60 mm in diameter at 300 mm, 80 mm at 500 mm and 160 mm at 1000 mm. Response time is 100 ms (90%).
Accuracy is ±2 °C from 0 to 200 °C and ±1% of reading from 201 to 400 °C (emissivity 0.95); reproducibility is ±1% of reading value. The sensor is powered from 12 to 24 V DC, draws 70 mA max. and its current output drives a load of up to 250 Ω. The SUS304 stainless steel housing is 120 mm long with an M18×P1.0 thread and a 12 mm lens diameter; the silicon lens and body provide protection equivalent to IP67. The cable is 2 m, 5-wire; operating temperature is 0 to 70 °C and weight is 180 g.
Omron ES1C-A40 technical specifications
| General | |
|---|---|
| Product type | Infrared thermosensor, non-contact temperature measurement |
| Sensing method | IR radiation |
| Light-receiving element | Thermopile |
| Housing | M18 threaded cylindrical housing, M18×P1.0 |
| Applicable safety standards | CE marking (EN/IEC 61326-1 industrial electromagnetic environment) |
| Detection | |
| Measuring temperature range | 0 to 400 °C |
| Measurement accuracy | 0 to 200 °C: ±2 °C; 201 to 400 °C: ±1% of reading (emissivity 0.95) |
| Reproducibility | ±1% of reading value |
| Emissivity | 0.95 fixed |
| Measurement wavelength | 8 to 14 µm |
| Response time | 100 ms/90% |
| Measurement range (90% optical response) | 60 mm dia. at 300 mm, 80 mm dia. at 500 mm, 160 mm dia. at 1000 mm |
| Electrical characteristics | |
| Power supply voltage | 12 to 24 V DC |
| Operating voltage range | 90% to 110% of rated voltage |
| Current consumption | 70 mA max. |
| Influence of EMS | ±10 °C max. for radiated field immunity and conducted disturbance immunity |
| Outputs and indicators | |
| Current output | 4 to 20 mA DC (0 to 400 °C), load 250 Ω max. |
| Connection method | 5-wire: brown power +, blue power −, black output +, gray output −, shield to frame ground |
| Isolation | Current output and power supply are not isolated |
| Environmental | |
| Operating temperature | 0 to 70 °C (with no icing or condensation) |
| Storage temperature | −20 °C to 70 °C (with no icing or condensation) |
| Ambient humidity range | Operating and storage: 35% to 85% |
| Vibration resistance (destruction) | 1.5 mm amplitude at 10 to 55 Hz for 2 hours each in X, Y and Z directions |
| Degree of protection | Equivalent to IP67 |
| Installation | Designed for indoor use only |
| Mechanical and connection | |
| Tube material | SUS304 stainless steel; silicon lens |
| Tube length | 120 mm (threaded section 60 mm), lens diameter 12 mm |
| Cable | 2 m, 5-wire, open ends |
| Mounting | With the enclosed lock nuts; tightening torque 20 N·m max. |
| Weight | 180 g |
Key features
- Wide 0 to 400 °C measuring range
- 4 to 20 mA DC current output corresponding to 0 to 400 °C
- Fast 100 ms (90%) response
- 80 mm measuring diameter at 500 mm distance
- SUS304 stainless steel body and silicon lens, equivalent to IP67, up to 70 °C ambient
ES1C-A40 ordering codes
| Part number | Description |
|---|---|
| ES1C-A40 | Measuring range 0 to 400 °C, 4 to 20 mA DC output, 2 m cable |
Other Omron Spot Temperature Sensors
- OMRON ES1B-140-260C — Infrared thermosensor, 140 to 260 °C
- OMRON ES1B-60-120C — Infrared thermosensor, 60 to 120 °C
Models from other brands: Spot Temperature Sensors
Is this non-contact temperature sensor right for your application?
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All product specifications are subject to change without notice. Source: Omron, product pages https://industrial.omron.eu/en/products/ES1C-A40 and https://industrial.omron.eu/en/products/es1c; ES1C datasheet, Cat. No. H163-E1-03, 2023 (https://files.omron.eu/downloads/latest/datasheet/en/h163_es1c_infrared_thermosensor_datasheet_en.pdf) (accessed 28 September 2026).